package ch03.demo.dao2.impl;

import org.apache.log4j.Logger;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;

public class IntermediaryInvocationHandler implements InvocationHandler {
    private Logger logger=Logger.getLogger(IntermediaryInvocationHandler.class);

    /**
     * 为被代理的接口方法定义的代理业务规则
     * @param proxy
     * @param method
     * @param args
     * @return
     * @throws Throwable
     */
    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        before();
        Object feedback=method.invoke(target,args);//反射执行目标对象的实际业务
        after();
        return "看房记录:买家反馈“"+feedback+"“";
    }
    /**
     * 代理的目标对象
     */
    private Object target;
    public void setTarget(Object target){
        this.target=target;
    }
    public void before(){
        logger.debug("前期准备。");
        logger.debug("查找房源。");
        logger.debug("和卖家沟通时间。");
    }
    public void after(){
        logger.debug("后期跟踪");
        logger.debug("和买家沟通意见。");
    }
}
